Polygon SLD Raises NullPointer Error when there is no Stroke element

Details

Description

If an sld is loaded, or created by Udig with the border disabled (in style gui) or without the style element, a NullPointerException is raised. Geoserver validates sld successfully if the stroke element is missing. This means that using the GUI, its difficult to set a polygon without an outline. Error log follows:

!ENTRY org.eclipse.jface 4 2 2016-06-30 13:14:28.155
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jface".
!STACK 0
java.lang.NullPointerException
at org.locationtech.udig.style.advanced.common.styleattributeclasses.LineSymbolizerWrapper.clearGraphicStroke(LineSymbolizerWrapper.java:206)
at org.locationtech.udig.style.advanced.polygons.PolygonPropertiesComposite.onStyleChanged(PolygonPropertiesComposite.java:278)
at org.locationtech.udig.style.advanced.common.ParameterComposite.notifyListeners(ParameterComposite.java:112)
at org.locationtech.udig.style.advanced.common.BoderParametersComposite.modifyText(BoderParametersComposite.java:686)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:179)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1058)
at org.eclipse.swt.widgets.Text.wmCommandChild(Text.java:2610)
at org.eclipse.swt.widgets.Control.WM_COMMAND(Control.java:4669)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4531)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4972)
at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2425)
at org.eclipse.swt.widgets.Text.callWindowProc(Text.java:255)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623)
at org.eclipse.swt.widgets.Text.windowProc(Text.java:2254)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4972)
at org.eclipse.swt.internal.win32.OS.SetWindowTextW(Native Method)
at org.eclipse.swt.internal.win32.OS.SetWindowText(OS.java:3446)
at org.eclipse.swt.widgets.Text.setText(Text.java:1977)
at org.locationtech.udig.style.advanced.common.BoderParametersComposite.update(BoderParametersComposite.java:441)
at org.locationtech.udig.style.advanced.polygons.PolygonPropertiesComposite.update(PolygonPropertiesComposite.java:100)
at org.locationtech.udig.style.advanced.polygons.PolygonPropertiesComposite.setRule(PolygonPropertiesComposite.java:93)
at org.locationtech.udig.style.advanced.polygons.PolygonPropertiesEditor$2.selectionChanged(PolygonPropertiesEditor.java:223)
at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:164)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:162)
at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2188)
at org.eclipse.jface.viewers.StructuredViewer.handleSelect(StructuredViewer.java:1211)
at org.eclipse.jface.viewers.StructuredViewer$4.widgetSelected(StructuredViewer.java:1241)
at org.eclipse.jface.util.OpenStrategy.fireSelectionEvent(OpenStrategy.java:239)
at org.eclipse.jface.util.OpenStrategy.access$4(OpenStrategy.java:233)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:403)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
at org.eclipse.jface.window.Window.open(Window.java:801)
at org.locationtech.udig.style.sld.editor.OpenStyleEditorAction.run(OpenStyleEditorAction.java:119)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:452)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.locationtech.udig.internal.ui.UDIGApplication.start(UDIGApplication.java:132)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
at org.eclipse.equinox.launcher.Main.run(Main.java:1410)